| 摘要 |
For extending the blind, the invention provides a brake-lifting motor/gear mechanism unit (14), the stator (15) of which is supported on a rotatable carrying member (16) counter to the resistance of a restoring spring (20). Consequently, the blind canvas (6) is fully tensioned, once it has been extended, and the unit (14) is brought into the braked state as a result of the carrying member (16) acting on a limit switch (22). The extension of the blind can be stopped in any intermediate positions by stopping the restoring-means drum (9) by means of an electromagnetically activated catch (23). <IMAGE>
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